@charset "utf-8";
body {
  padding: 20px 0 0 20px;
}
/*页面上画出三角形{begin}*/
.sanjiao {
  border-width: 20px;
  border-color: transparent transparent transparent green;
  border-style: dashed dashed dashed solid;
  width: 0;
  height: 0;
  overflow: hidden;
}
/*页面上画出三角形{end}*/
/*矩形圆角{begin}*/
.border-radius {
  width: 100px;
  height: 40px;
  background-color: green;
  -webkit-border-radius: 5px;
  -moz-border-radius: 5px;
  border-radius: 5px;
}
/*矩形圆角{end}*/
/*相对定位,绝对定位,固定定位*/
